Equipment unit · VIN-decoded · NHTSA vPIC

2021 Dragon esp Dragon ESP

1UNSD3729MS174549 · Trailer · TRAILER

Carriers run under2

9 mo

Inspections3

all-time

OOS inspections2

of 3

First seen05/15/2025

Last seen02/13/2026

Inspected under 2 different carriers in 9 months

A unit that bounces between many operators can indicate slip-seating, heavy sub-haul, or double-brokering. Review the carrier timeline below for load integrity — context for human judgment, not a verdict.

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN: 1UNSD3729MS174549
Make: Dragon esp
Model: Dragon ESP
Model year: 2021
Body class: Trailer
Vehicle type: TRAILER
GVWR: Not decoded
Decoded at: 07/26/2026

vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.

Inspection history

Every roadside inspection of this VIN, newest first · 05/15/2025 – 02/13/2026

Date	State	Level	Viol.	OOS	Carrier (DOT)	Plate
02/13/2026	TX	II · Walk-around	0	—	STS CONTRACTORS LLC 4487365	2583985/ME
02/04/2026	TX	II · Walk-around	4	OOS	STS CONTRACTORS LLC 4487365	2583985/ME
05/15/2025	TX	I · Full	8	OOS	SALDIVAR TRANSPORTATION SERVICES LLC 3648869	2583985/ME

Carriers this unit has run under

2 distinct carriers · grouped by DOT · newest activity first

Carrier	DOT	First seen	Last seen	Insp.	State
STS CONTRACTORS LLC	4487365	02/04/2026	02/13/2026	2	TX
SALDIVAR TRANSPORTATION SERVICES LLC	3648869	05/15/2025	05/15/2025	1	TX

Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.

Plate & unit-number history

The same truck under different plate registrations across carriers

Plate	State / prov.	Unit no.	Carrier	Date range	Insp.
2583985	ME	—	STS CONTRACTORS LLC	02/04/2026 → 02/13/2026	2
2583985	ME	—	SALDIVAR TRANSPORTATION SERVICES LLC	05/15/2025 → 05/15/2025	1

Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded 07/26/2026